SIJIL PELAJARAN MALAYSIA /1 KIMIA Kertas 1 1 ¼ jam Satu jam lima belas minit

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1 1 SULIT 4541/1 MOUL SOLN ERFOKUS SIJIL PELJRN MLYSI 2018 NJURN MPSM WNGN PULU PINNG ENGN KERJSM SEKTOR PENGURUSN KEMIK JTN PENIIKN PULU PINNG SIJIL PELJRN MLYSI /1 KIMI Kertas 1 1 ¼ jam Satu jam lima belas minit JNGN UK KERTS SOLN INI SEHINGG IERITHU rahan: 1. Kertas soalan ini mengandungi 50 soalan. 2. Jawab semua soalan. 3. Tiap-tiap soalan diikuti oleh empat pilihan jawapan iaitu,, dan. agi tiap-tiap soalan, pilih satu jawapan sahaja. Hitamkan jawapan anda pada kertas jawapan objektif yang disediakan. Kertas soalan ini mengandungi 25 halaman bercetak

2 2 1 Which substance undergoes sublimation when heated? ahan manakah yang mengalami pemejalwapan apabila dipanaskan? Ethanol Etanol romine water ir bromin Sodium chloride Natrium klorida mmonium chloride mmonium klorida 2 Hydrogen and chlorine react as shown. Hidrogen dan klorin bertindak balas seperti berikut. 1 molecule of hydrogen + 1 molecule of chlorine 2 molecule of hydrogen chloride 1 molekul hidrogen + 1 molekul klorin 2 molekul hidrogen klorida What is the equation for this reaction? pakah persamaan kimia bagi tindak balas ini? 2H + 2l 2Hl 2H + 2l H 2 l 2 H 2 + l 2 2Hl H 2 + l 2 H 2 l 2 3 Fluorine, chlorine and bromine are in the same group in the Periodic Table of Elements. What is the name of the group? Fluorin, klorin dan bromin berada dalam kumpulan yang sama dalam Jadual erkala Unsur. pakah nama kumpulan itu? lkali metal Logam alkali Halogen Halogen Transition element Unsur peralihan Noble gas Gas adi

3 3 4 iagram 1 shows a carbon compound. Rajah 1 menunjukkan satu sebatian karbon. iagram 1 Rajah 1 How many pairs of electrons are shared by the atoms in this compound? erapakah pasangan elektron yang dikongsi oleh atom-atom dalam sebatian ini? Which ions are present in molten sodium chloride? Ion manakah yang terdapat dalam leburan natrium klorida? Na +, l - H +, OH - Na +, l -, OH - Na +, l -, H +, OH - 6 Which substance consists of atoms? ahan manakah yang terdiri daripada atom? alcium Kalsium Nitrogen gas Gas nitrogen Lead(II) bromide Plumbum(II) bromide Naphthalene Naftalena

4 4 7 Which of the following ph values is for strong acid solution? ntara berikut, yang manakah nilai ph bagi larutan asid kuat? ph14 ph11 ph5 ph1 8 Photochromic glasses contain a chemical that is photosensitive. Which of the following is the chemical? Kaca fotokromik mengandungi bahan kimia yang peka cahaya. ntara berikut, yang manakah bahan kimia itu? Silver bromide rgentum bromide Lead (II) oxide Plumbum (II) oksida Lead (II) bromide Plumbum (II) bromide oron oxide oron oksida 9 Which of the following is the molecular formula for propanol? ntara berikut, yang manakah merupakan formula molekul bagi propanol? 3 H 6 3 H 8 3 H 8 O 3 H 8 O 2 10 Which salt is insoluble in water? Garam manakah yang tidak larut dalam air? Silver nitrate rgentum nitrat alcium sulphate Kalsium sulfat Silver nitrate rgentum nitrat Sodium carbonate Natrium karbonat

5 5 11 iagram 2 shows a cold pack. Rajah 2 menunjukkan satu pek sejuk. Substance X + water ahan X + air iagram 2 Rajah 2 When the cold pack is squeezed, a plastic tube containing substance X breaks and mixes with water inside the pack. The pack instantly gets extremely cold. What is substance X? pabila pek sejuk ditekan, tiub plastik yang mengandungi bahan X pecah dan bercampur dengan air di dalam pek. Pek tersebut menjadi sangat sejuk dengan segera. pakah bahan X? mmonium nitrate mmonium nitrat Magnesium sulphate Magnesium sulfat opper(ii) chloride Kuprum(II) klorida Sodium carbonate Natrium karbonat

6 6 12 iagram 3 shows some reactions of substance Y. Rajah 3 menunjukkan beberapa tindak balas bagi bahan Y. Heat with an ammonium compound Panaskan dengan sebatian ammonium mmonia Substance Y ahan Y Heat with dilute acid Panaskan dengan asid cair Salt Garam iagram 3 Rajah 3 What is substance Y? pakah bahan Y? lcohol lkohol ase es atalyst Mangkin Metal Logam 13 Which of the following is suitable to electroplate an iron spoon with silver? ntara berikut, yang manakah sesuai untuk menyadurkan sudu besi dengan argentum? node nod Silver rgentum Silver rgentum Iron spoon Sudu besi Iron spoon Sudu besi athode Katod Iron spoon Sudu besi Iron spoon Sudu besi Silver rgentum Silver rgentum Electrolyte Elektrolit Silver nitrate solution Larutan argentum nitrat Silver chloride solution Larutan argentum klorida Silver chloride solution Larutan argentum klorida Silver nitrate solution Larutan argentum nitrat

7 7 14 ased on the following equation, which substance is oxidised? erdasarkan persamaan berikut, bahan manakah yang dioksidakan? Fe 2 O 3 + 3O 2Fe +3O 2 O Fe 2 O 3 Fe O 2 15 Material Y has the following properties. ahan Y mempunyai sifat-sifat berikut. low coefficient of thermal expansion pekali pengembangan terma yang rendah very high resistance to chemical substances rintangan sangat tinggi terhadap bahan kimia What is material Y? pakah bahan Y? rass Loyang Steel Keluli orosilicate glass Kaca borosilikat Photochromic glass Kaca fotokromik 16 The following chemical equation represents the reaction between calcium carbonate, ao 3 and hydrochloric acid, Hl. Persamaan kimia berikut mewakili tindak balas antara kalsium karbonat, ao 3 dan asid hidroklorik, Hl. ao 3 + 2Hl al 2 + H 2 O + O 2 Which change is the most suitable to be used to determine the rate of reaction? Perubahan manakah yang paling sesuai digunakan untuk menentukan kadar tindak balas? Volume of carbon dioxide gas released per unit time. Isi padu gas karbon dioksida yang dibebaskan per unit masa. oncentration of calcium chloride produced per unit time. Kepekatan kalsium klorida yang terhasil per unit masa. Mass of calcium carbonate per unit time. Jisim kalsium karbonat per unit masa. olour of the solution per unit time. Warna larutan per unit masa.

8 8 17 iagram 4 shows two containers filled with 1,1,1,2 tetrafluoroethane gas.the gas is used as a cooling agent in a car s refrigerant system. Rajah 4 menunjukkan dua bekas berisi gas 1,1,1,2- tetrafloroetana. Gas tersebut digunakan sebagai agen pendingin dalam sistem penghawa dingin kereta. iagram 4 Rajah 4 What is the type of reaction to change ethane gas to 1,1,1,2 tetrafluoroethane gas? pakah jenis tindak balas untuk menukarkan gas etana kepada gas 1,1,1,2- tetrafloroetana? ddition Penambahan Oxidation Pengoksidaan Esterification Pengesteran Substitution Penukargantian 18 Which of the following is true regarding the use of modern medicine? ntara berikut yang manakah benar tentang kegunaan ubat moden? Type of modern medicine Jenis ubat moden arbiturate arbiturat odeine Kodeina Paracetamol Parasetamol Streptomycin Streptomisin Uses Kegunaan To treat hallucination Untuk merawat halusinasi To relieve headaches Untuk melegakan kesakitan kepala To suppress cough Untuk menahan batuk To kill tuberculosis germs Untuk membunuh bakteria batuk kering 19 Which substance is a covalent compound? ahan manakah adalah sebatian kovalen? SO 2 ao MgO Znl 2

9 9 20 The heat of combustion of ethanol is less than the heat of combustion of butanol because Haba pembakaran etanol adalah kurang daripada haba pembakaran butanol kerana ethanol has less number of carbon atoms per molecule than butanol etanol mengandungi bilangan atom karbon per molekul yang lebih rendah daripada butanol ethanol is more soluble in water compared to butanol etanol adalah lebih larut dalam air berbanding dengan butanol Ethanol has lower boiling point Etanol mempunyai takat lebur yang lebih rendah Ethanol is miscible in water Etanol terlarut campur dalam air. 21 iagram 5 shows the graph of temperature against time for the heating of liquid P. Rajah 5 menunjukkan graf suhu melawan masa bagi pemanasan cecair P. Temperature ( o ) Suhu iagram 5 Rajah 5 Time (min) Masa What can be deduced from the graph above? pakah yang boleh dideduksi daripada graf di atas? Melting point of substance P is T 2 o Takat lebur bahan P ialah T 2 o Substance exists as solid between 0 min to m 1 min ahan P wujud sebagai pepejal dari 0 min hingga m 1 min Heat absorbed from m 2 to m 3 increases the kinetic energy of particles Haba yang diserap dari m 2 hingga m 3 meningkatkan tenaga kinetik zarah-zarah Forces of attraction between particles at the temperature of T 3 o is stronger than T 1 o aya tarikan antara zarah pada suhu T 3 o lebih kuat daripada T 1 o

10 10 22 n element does not conduct electricity and exists as diatomic molecule. Which area in the Periodic Table this element can be found? Suatu unsur tidak dapat mengkonduksikan arus elektrik dan wujud sebagai molekul dwiatom. alam kawasan manakah unsur ini boleh didapati dalam Jadual erkala? 23 Which of the following compound does not dissolve in water? Manakah antara sebatian berikut tidak larut dalam air? Magnesium oxide Magnesium oksida Hydrogen chloride Hidrogen klorida Naphthalene Naftalena Sodium chloride Natrium klorida 24. n organic compound Q produces hydrogen gas when it reacts with zinc. What is Q? Suatu sebatian organik Q menghasilkan gas hidrogen apabila bertindak balas dengan zink. pakah Q?

11 25 Psychiatric patients are always restless and nomally experience difficulties in sleeping. Which medicine is suitable to treat these patients?

11 11 25 Psychiatric patients are always restless and nomally experience difficulties in sleeping. Which medicine is suitable to treat these patients? Pesakit psikiatrik sentiasa resah dan biasanya mengalami masalah sukar untuk tidur. Ubat manakah sesuai digunakan untuk merawat pesakit tersebut? spirin spirin arbiturate arbiturat odeine Kodeina Penicillin Penisilin 26 Which salt is insoluble in water? Garam manakah yang tidak larut dalam air? Potassium carbonate Kalium karbonat arium sulphate arium sulfat Iron(II) chloride Ferum(II) klorida opper(ii) sulphate Kuprum(II) sulfat 27 iagram 6 shows the apparatus set-up to study the effect of other metal on rusting. Rajah 6 menunjukkan susunan radas untuk mengkaji kesan logam lain ke atas pengaratan. Zinc strip Jalur zink gar solution Larutan agar-agar Iron strip Jalur besi iagram 6 Rajah 6 ased on iagram 6, which statement is true? erdasarkan Rajah 6, pernyataan manakah adalah benar? Iron atom is reduced tom ferum diturunkan Zinc atom releases electron tom zink membebaskan elektron Iron is an oxidising agent Ferum adalah agen pengoksidaan Oxidation number of zinc decreases Nombor pengoksidaan zink berkurang

12 12 28 Table 1 shows the heat of combustion of four alcohols. Jadual 1 menunjukkan haba pembakaran bagi empat alkohol. lcohol lkohol Methanol Metanol Ethanol Etanol Propan-1-ol Propan-1-ol utan-1-ol utan-1-ol Heat of combustion (kj mol -1 ) Haba pembakaran (kj mol -1 ) Table 1 Jadual Which of the following increases the heat of combustion of alcohols? ntara berikut, yang manakah meningkatkan haba pembakaran alkohol? Number of hydrogen atoms per molecule decreases ilangan atom hidrogen per molekul berkurang Number of oxygen atoms per molecule increases ilangan atom oksigen per molekul bertambah Number of carbon atoms per molecule increases ilangan atom karbon per molekul bertambah Size of molecule decreases Saiz molekul berkurang

13 13 29 n experiment is carried out to investigate the rate of reaction for the reaction between zinc granules and nitric acid to produce hydrogen gas. Satu eksperimen dijalankan untuk menyiasat kadar tindak balas bagi tindak balas antara butiran zink dan asid nitrik untuk menghasilkan gas hidrogen Experiment I II Substances Excess zinc granules and 25 cm 3 of 2 mol dm 3 nitric acid utiran zink yang berlebihan dan 25 cm 3 2 mol dm 3 asid hidroklorik Excess zinc granules and 25 cm 3 of 1 mol dm 3 nitric acid utiran zink yang berlebihan dan 25 cm 3 1 mol dm 3 asid nitrik Which of the following graphs represents the reactions? ntara berikut, graf yang manakah mewakili tindak balas itu?

14 14 30 iagram 7 shows the apparatus set up for the electrolysis of 0.1 mol dm -3 copper(ii) sulphate solution. Rajah 7 menunjukkan susunan radas bagi elektrolisis larutan kuprum(ii) sulfat. 0.1 mol dm -3 iagram 7 Rajah 7 What would be observed when the electrical current is allowed to flow for 30 minutes? pakah yang diperhatikan apabila arus elektrik dialirkan selama 30 minit? Electrode Q become smaller Elektrod Q semakin kecil rown solid is deposited at electrode P Pepejal perang terenap pada elektrod P The intensity of blue colour of the solution decreasing Keamatan warna biru larutan semakin berkurang ubbles of gas are produced at electrod P Gelembung gas terhasil pada elektrod P 31 iagram 8 shows a zinc strip that is placed in a copper can containing copper(ii) sulphate solution. Rajah 8 menunjukkan satu jalur zink yang diletakkan di dalam sebuah tin kuprum yang berisi larutan kuprum(ii) sulfat. Zinc strip Jalur zink opper can Tin kuprum opper(ii) sulphate solution Larutan kuprum(ii) sulfat iagram 8 Rajah 8

15 15 Which of the following is true if a wire is used to connect the zinc strip with copper can? ntara berikut, yang manakah benar jika satu wayar digunakan untuk menyambung jalur zink dengan tin kuprum? layer of brown solid is deposited on the interior wall of copper can Selapisan pepejal perang terenap pada dinding sebelah dalam tin kuprum Oxidation number of zinc decreases from +2 to 0 Nombor pengoksidaan zink berkurang daripada +2 kepada 0 opper can acts as oxidising agent Kuprum bertindak sebagai agen pengoksidaan Zinc strip becomes thicker Jalur zink menjadi semakin tebal 32 mixture containing two anions was tested and the results are shown below. Satu campuran mengandungi dua anion telah diuji dan keputusannya ditunjukkan di bawah. ilute nitric acid sid nitrik cair Test Ujian ilute nitric acid added, followed by aqueous silver nitrate Tambah asid nitrik, diikuti oleh larutan gentum nitrat Results Keputusan Gas bubbles which turned limewater milky Gelembung-gelembung gas yang menukarkan air kapur menjadi keruh White precipitate formed. Mendakan putih terbentuk Which anions were present? nion-anion apakah yang hadir? arbonate and chloride Karbonat dan klorida arbonate and iodide Karbonat dan iodide Sulphate and chloride Sulfat dan klorida Sulphate and iodide Sulfat dan iodide

16 16 33 iagram 9 shows two volumetric flasks containing solutions of ROOH acid and HX acid. Which statement is not true about both of the acids? Rajah 9 menunjukkan dua kelalang volumetrik mengandungi larutan asid ROOH dan asid HX. Pernyataan manakah tidak benar tentang kedua-dua asid itu? 100 cm 3 HOOH acid, 1 mol dm cm 3 HXacid, 1 mol dm cm 3 asid HOOH, 1 mol dm cm 3 asid HX, 1 mol dm -3 The degree of ionisation of HX acid is higher. arjah pengionan asid HX lebih tinggi. oth of the acids are monoprotic acid. Kedua-dua asid adalah asid monoprotik. cid ROOH has higher ph value. Nilai ph asid ROOH lebih tinggi. iagram 9 Rajah 9 The concentration of hydrogen ion in acid ROOH is higher. Kepekatan ion hidrogen dalam asid ROOH lebih tinggi.

17 17 34 Which of the following represent structure of the compound formed when sodium react with oxygen? ntara yang berikut, struktur manakah mewakili sebatian yang terhasil apabila natrium bertindak balas dengan oksigen? 35 The chemical formula of X is Tl 2. What is the chemical formula of the compound formed when cation of X react with oxygen? Formula kimia bagi X ialah Tl 2. pakah formula kimia bagi sebatian yang terbentuk apabila kation X bertindak balas dengan oksigen? TO TO 2 T 2 O 3 T 2 O

18 18 36 iagram 10 shows a part of the Periodic Table of elements. Rajah 10 menunjukkan sebahagian daripada Jadual erkala Unsur. Y W X Z iagram 10 Rajah 10 Which of the following elements W, X, Y and Z in the Periodic Table of Elements is suitable to be used in a scuba diving tank? ntara unsur W, X, Y dan Z dalam Jadual erkala Unsur, yang manakah digunakan dalam tangki penyelam skuba? W X Y Z 37 Veronal is a barbiturate used to induce sleep in psychiatric patients. The molecular formula of veronal is shown in the diagram below Veronal ialah ubat pelali yang digunakan untuk merangsang pesakit mental untuk tidur. Formula molekul bagi veronal ditunjukkan dalam rajah di bawah 4 H 2 N 2 O 3 ( 2 H 5 ) 2 etermine the relative molecular mass of veronal. Tentukan jisim molekul relatif bagi veronal. [Relative atomic mass : H=1, =12, N=14, O=16] [Jisim atom relatif : H=1, =12, N=14, O=16]

19 19 38 Excess magnesium is added to 25 cm 3 of 0.2 mol dm -3 hydrochloric acid at room temperature. The experiment is repeated using hydrochloric acid of the same volume and concentration but heated to a higher temperature. Which of the following graphs show the volume of gas collected at regular interval time for the two experiments? Magnesium yang berlebihan dicampurkan kepada 25 cm 3 asid hidroklorik berkepekatan 0.2 mol dm -3 pada suhu bilik. Eksperimen ini diulangi dengan menggunakan asid hidroklorik pada isi padu dan kepekatan yang sama tetapi dipanaskan kepada suhu yang lebih tinggi. ntara graf berikut, yang manakah menunjukkan isi padu gas yang terkumpul pada sela masa tertentu untuk kedua-dua eksperimen ini? Original experiment Repeated experiment Eksperimen asal Eksperimen ulangan Z X Z Y W Y W X 39 The following statement is about X 2+ ion. Pernyataan berikut adalah berkaitan ion X 2+. X 2+ ion has 12 neutrons and 10 electrons. Ion X 2+ mempunyai 12 neutron dan 10 elektron What are the proton number and nucleon number for atom X? pakah nombor proton dan nombor nukleon bagi atom X? Proton number Nucleon number Nombor proton Nombor nukleon

20 40 iagram 11 shows a factory which produces sulphuric acid. Gas X released from factory causes air pollution. Rajah 11 menunjukkan sebuah kilang yang menghasilkan asid sulfurik.

20 20 40 iagram 11 shows a factory which produces sulphuric acid. Gas X released from factory causes air pollution. Rajah 11 menunjukkan sebuah kilang yang menghasilkan asid sulfurik. Gas X yang terbebas daripada kilang ini menyebabkan pencemaran udara. Gas X Which of the gas following is X? ntara gas berikut yang manakah X? iagram 11 Rajah 11 arbon dioxide Karbon dioksida arbon monoxide Karbon monoksida Nitrogen dioxide Nitrogen dioksida Sulphur dioxide Sulfur dioksida g of hydrated copper(ii) sulphate, uso 4.xH 2 O has 4.5 g of water of crystallisation. What is the value of x? 12.5 g kuprum(ii) sulfat terhidrat, uso 4.xH 2 O mempunyai 4.5 g air penghabluran. pakah nilai x? [Relative atomic mass: u, 64; S, 32; O, 16; H, 1] [Jisim atom relatif: u, 64; S, 32; O, 16; H, 1]

21 21 42 ifferent metals were tested using the apparatus shown in iagram 12. Which pair of metal shows the highest voltage reading? Logam yang berbeza diuji menggunakan susunan radas seperti yang ditunjukkan dalam Rajah 12. Pasangan logam yang manakah menunjukkan bacaan voltan yang paling tinggi. Metal X Logam X Metal Y Logam Y Electrolyte Elektrolit opper and silver Kuprum dan argentum Zinc and copper Zink and kuprum Magnesium and zinc Magnesium dan zink Magnesium and silver Magnesium dan argentum iagram 12 Rajah lab assistant need to prepare 100 cm 3 solution of hydrochloric acid 0.1 mol dm -3 from a solution of hydrochloric acid 1.0 mol dm -3 that has been prepared before using dilution method. What is the volume of hydrochloric acid 1.0 mol dm -3 needed to be added to water? Seorang pembantu makmal perlu menyediakan 100 cm 3 larutan asid hidroklorik 0.1 mol dm -3 daripada larutan asid hidroklorik 1.0 mol dm -3 yang sedia ada melalui kaedah pencairan. erapakah isipadu asid hidroklorik 1.0 mol dm -3 yang diperlukan untuk ditambahkan ke dalam air? 1.0 cm cm cm cm 3

22 22 44 Table 2 shows the volume of gas collected when calcium carbonate reacts with hydrochloric acid. Jadual 2 menunjukkan isi padu gas yang dikumpulkan apabila kalsium karbonat bertindak balas dengan asid hidroklorik. Time / min Masa / min Volume of O 2 / cm 3 Isi padu O 2 / cm alculate the average rate of reaction. Kirakan kadar tindak balas purata. 630 cm 3 min cm 3 min cm 3 min cm 3 min -1 Table 2 Jadual 2 45 When a mixture of butene and hydrogen gas is channeled over heated platinum, gas X is produced. What is the characteristic of gas X? pabila satu campuran butena dan gas hidrogen dialirkan ke atas kepingan platinum, gas X dihasilkan. pakah ciri gas X? decolourises the brown coloured bromine water melunturkan warna perang air bromin releases hydrogen gas when reacting with potassium membebaskan gas hydrogen apabila bertindak balas dengan kalium decolourise the purple colour of acidified potassium manganate(vii) solution melunturkan warna ungu larutan kalium manganat(vii) berasid undergoes a substitution reaction with chlorine gas under sunlight mengalami tindak balas penukargantian dengan gas klorin di bawah cahaya matahari 46 In an experiment, 2 g of magnesium powder is added to 50 cm 3 of 0.2 mol dm -3 zinc sulphate solution. The temperature of the mixture increases by 12. What is the heat of displacement in the experiment? [Specific heat capacity of a solution = 4.2 J g 1 1 ; Relative atomic mass of Mg = 24] alam satu eksperimen, 2 g serbuk magnesium ditambahkan kepada of 0.2 mol dm 3 larutan zink sulfat. Suhu campuran meningkat sebanyak 12. erapakah haba penyesaran dalam eksperimen ini? [Muatan haba tentu larutan = 4.2 J g 1 1, Jisim atom relatif Mg = 24] 5.04 kj mol kj mol kj mol kj mol -1

23 23 47 Table 3 shows the information of three voltaic cells. Jadual 3 menunjukkan maklumat bagi tiga sel voltan. Voltaic cell Sel voltan Electrodes Elektrod Potential difference/v eza keupayaan/v Negative terminal Terminal negatif X Zinc and magnesium Zink dan magnesium 1.6 Magnesium Magnesium Y Iron and zinc esi dan zink 0.2 Zinc Zink Z opper and magnesium Kuprum dan magnesium 2.6 Magnesium Magnesium Table 3 Jadual 3 What is the potential difference of the voltaic cell consisting of copper and iron electrodes? erapakah beza keupayaan sel voltan yang terdiri daripada elektrod kuprum dan besi? 0.8 V 1.0 V 1.8 V 2.4 V

24 24 48 iagram 13 shows three balloons with X 2, Y 2 and Z 2 repectively. Rajah 13 menunjukkan tiga biji belon dengan gas X 2, Y 2 and Z 2 masing-masing. iagram 13 Rajah 13 rrange the gases in ascending order of volume. [Relative atomic mass: X = 1, Y = 14, Z = 16 and 1 mole of gas occupies 24 dm 3 at room conditions] Susunkan gas-gas itu mengikut tertib menaik isipadunya. [Jisim atom relatif: X = 1, Y = 14, Z = 16 dan 1 mol gas menempati 24 dm 3 pada keadaan bilik] X 2, Y 2, Z 2 X 2, Z 2, Y 2 Y 2, Z 2, X 2 Z 2, Y 2, X 2 49 Table 4 shows the result obtained from the decomposition of hydrogen peroxide. Jadual 4 menunjukkan keputusan yang diperoleh daripada penguraian hidrogen peroksida. Time/min Masa/min Volume of O 2 gas / cm 3 Isi padu gas O 2 / cm Table 4 Jadual 4 alculate the average rate of decomposition of hydrogen peroxide in second minute. Kira kadar tindak balas purata bagi penguraian hidrogen peroksida dalam minit kedua. 40 cm 3 min cm 3 min cm 3 min cm 3 min -1

25 25 50 W, X, Y and Z are four metals. onsider the reactions below involving these metals. W, X, Y dan Z terdiri dari empat logam. Pertimbangkan tindak balas- tindak balas di bawah yang melibatkan logam-logam tersebut : Z sulphate + X Z + X sulphate Z sulfat + X Z + X sulfat Z sulphate + W No reaction Z sulfat + W tiada tindak balas Y sulphate + W Y + W sulphate Y sulfat + W Y + W sulfat rrange the metals W, X, Y and Z in decending order of the reactivity. Susun kereaktifan logam-logam W, X, Y dan Z mengikut tertib menurun. X, W, Z, Y X, Z, W, Y Y, W, Z, X Y, Z, W, X EN OF QUESTION PPER KERTS SOLN TMT

Section B Bahagian B. [20 marks] [20 markah] Answer any one questions from this section. Jawab mana-mana satu soalan daripada bahagian ini.

Section B Bahagian B. [20 marks] [20 markah] Answer any one questions from this section. Jawab mana-mana satu soalan daripada bahagian ini. Section B Bahagian B [20 marks] [20 markah] Answer any one questions from this section. Jawab mana-mana satu soalan daripada bahagian ini. 1. (a) What is meant by electrolysis? Apakah yang dimaksudkan